Amoxicillin was initially patented and sold under the name Amoxil. The patent expired, which ushered in many other drug combinations, one of which was the well-known Augmentin. Now, Augmentin is no longer patented. Penicillin is the precursor to amoxicillin. The discovery of penicillin's ability to fight and eradicate harmful bacteria was unprecedented.
It paved the way for many other drugs of its kind, including amoxicillin. This drug is a cheaper antibiotic that treats a wide array of gram-positive bacteria and is less likely to produce allergic reactions. Penicillin V is an antibiotic that is in the penicillin group of drugs. Amoxicillin tablets can be labeled as "penicillin."